diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 44baeaf..53c3223 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,3 +35,9 @@ jobs:
         if: ${{ matrix.php >= 7.3 }}
       - run: vendor/bin/phpunit --coverage-text -c phpunit.xml.legacy
         if: ${{ matrix.php < 7.3 }}
+      - run: cd tests/install-as-dep && composer install && php query.php
+      - run: cd tests/install-as-dep && php -d phar.readonly=0 vendor/bin/phar-composer build . query.phar
+        continue-on-error: ${{ matrix.os == 'windows-2019' }}
+        id: phar
+      - run: php tests/install-as-dep/query.phar
+        if: ${{ steps.phar.outcome == 'success' }}
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 8c38d9a..1b8eb6a 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -9,6 +9,7 @@
     <testsuites>
         <testsuite name="SQLite React Test Suite">
             <directory>./tests/</directory>
+            <exclude>./tests/install-as-dep/</exclude>
         </testsuite>
     </testsuites>
     <coverage>
diff --git a/phpunit.xml.legacy b/phpunit.xml.legacy
index e65d4cb..080247b 100644
--- a/phpunit.xml.legacy
+++ b/phpunit.xml.legacy
@@ -8,6 +8,7 @@
     <testsuites>
         <testsuite name="SQLite React Test Suite">
             <directory>./tests/</directory>
+            <exclude>./tests/install-as-dep/</exclude>
         </testsuite>
     </testsuites>
     <filter>
diff --git a/src/Factory.php b/src/Factory.php
index 98a4f28..7e7f6ca 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -226,7 +226,16 @@ public function openLazy($filename, $flags = null, array $options = [])
 
     private function openProcessIo($filename, $flags = null)
     {
-        $command = 'exec ' . \escapeshellarg($this->bin) . ' sqlite-worker.php';
+        $cwd = null;
+        $worker = \dirname(__DIR__) . '/res/sqlite-worker.php';
+
+        if (\class_exists('Phar', false) && \Phar::running(false) !== '') {
+            $worker = '-r' . 'require(' . \var_export($worker, true) . ');'; // @codeCoverageIgnore
+        } else {
+            $cwd = __DIR__ . '/../res';
+            $worker = \basename($worker);
+        }
+        $command = 'exec ' . \escapeshellarg($this->bin) . ' ' . escapeshellarg($worker);
 
         // Try to get list of all open FDs (Linux/Mac and others)
         $fds = @\scandir('/dev/fd');
@@ -269,7 +278,7 @@ private function openProcessIo($filename, $flags = null)
             $command = 'exec bash -c ' . \escapeshellarg($command);
         }
 
-        $process = new Process($command, __DIR__ . '/../res', null, $pipes);
+        $process = new Process($command, $cwd, null, $pipes);
         $process->start($this->loop);
 
         $db = new ProcessIoDatabase($process);
@@ -285,7 +294,16 @@ private function openProcessIo($filename, $flags = null)
 
     private function openSocketIo($filename, $flags = null)
     {
-        $command = \escapeshellarg($this->bin) . ' sqlite-worker.php';
+        $cwd = null;
+        $worker = \dirname(__DIR__) . '/res/sqlite-worker.php';
+
+        if (\class_exists('Phar', false) && \Phar::running(false) !== '') {
+            $worker = '-r' . 'require(' . \var_export($worker, true) . ');'; // @codeCoverageIgnore
+        } else {
+            $cwd = __DIR__ . '/../res';
+            $worker = \basename($worker);
+        }
+        $command = \escapeshellarg($this->bin) . ' ' . escapeshellarg($worker);
 
         // launch process without default STDIO pipes, but inherit STDERR
         $null = \DIRECTORY_SEPARATOR === '\\' ? 'nul' : '/dev/null';
@@ -307,7 +325,7 @@ private function openSocketIo($filename, $flags = null)
         stream_set_blocking($server, false);
         $command .= ' ' . stream_socket_get_name($server, false);
 
-        $process = new Process($command, __DIR__ . '/../res', null, $pipes);
+        $process = new Process($command, $cwd, null, $pipes);
         $process->start($this->loop);
 
         $deferred = new Deferred(function () use ($process, $server) {
diff --git a/tests/install-as-dep/.gitignore b/tests/install-as-dep/.gitignore
new file mode 100644
index 0000000..070e2f2
--- /dev/null
+++ b/tests/install-as-dep/.gitignore
@@ -0,0 +1,3 @@
+/composer.lock
+/query.phar
+/vendor/
diff --git a/tests/install-as-dep/composer.json b/tests/install-as-dep/composer.json
new file mode 100644
index 0000000..ff46121
--- /dev/null
+++ b/tests/install-as-dep/composer.json
@@ -0,0 +1,20 @@
+{
+    "require": {
+        "clue/reactphp-sqlite": "*@dev"
+    },
+    "require-dev": {
+        "clue/phar-composer": "^1.0"
+    },
+    "bin": [
+        "query.php"
+    ],
+    "repositories": [
+        {
+            "type": "path",
+            "url": "../../",
+            "options": {
+                "symlink": false
+            }
+        }
+    ]
+}
diff --git a/tests/install-as-dep/query.php b/tests/install-as-dep/query.php
new file mode 100644
index 0000000..d2ab547
--- /dev/null
+++ b/tests/install-as-dep/query.php
@@ -0,0 +1,26 @@
+<?php
+
+if (file_exists(__DIR__ . '/vendor/autoload.php')) {
+    require __DIR__ . '/vendor/autoload.php';
+} else {
+    require __DIR__ . '/../../vendor/autoload.php';
+}
+
+$factory = new Clue\React\SQLite\Factory();
+$db = $factory->openLazy(':memory:', null, ['idle' => 0.001]);
+
+$query = isset($argv[1]) ? $argv[1] : 'SELECT 42 AS value';
+$args = array_slice(isset($argv) ? $argv : [], 2);
+
+$db->query('SELECT ? AS answer', [42])->then(function (Clue\React\SQLite\Result $result) {
+    if ($result->columns !== ['answer'] || count($result->rows) !== 1 || $result->rows[0]['answer'] !== 42) {
+        var_dump($result);
+        throw new RuntimeException('Unexpected result');
+    }
+
+    $answer = $result->rows[0]['answer'];
+    echo 'Answer: ' . $answer . PHP_EOL;
+})->then(null, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
+    exit(1);
+});